In order for a link to be considered valid when using IS in a trigger, you first need to have tracked that link via Munchkin at least once, so click on this link on a tracked page should make it valid. Second, you need to omit the 'http://' or 'https://' at the beginning of each link.

In order for a link to be considered valid when using IS in a trigger, you first need to have tracked that link via Munchkin at least once, so click on this link on a tracked page should make it valid. Second, you need to omit the 'http://' or 'https://' at the beginning of each link.